CN1683139A

CN1683139A - Mold and tread made therein

Info

Publication number: CN1683139A
Application number: CNA2005100634987A
Authority: CN
Inventors: E·d·贝内迪蒂; G·梅纳尔
Original assignee: Michelin Recherche et Technique SA Switzerland; Societe de Technologie Michelin SAS
Current assignee: Michelin Recherche et Technique SA Switzerland; Societe de Technologie Michelin SAS
Priority date: 2004-04-13
Filing date: 2005-04-11
Publication date: 2005-10-19
Also published as: JP2005297572A; EP1586438B1; KR20060046617A; DE602005000902D1; FR2868730B1; PL1586438T3; FR2868730A1; DE602005000902T2; EP1586438A1; ATE359907T1

Abstract

Mold for molding a tread that comprises a running surface, lateral faces and at least one axial cavity opening onto at least one lateral face. The cavity is molded with the aid of a pin which, during molding, produces two rubber mix flows that envelop the pin and reunite to form a junction surface, such that the mean length of the trace of this junction surface in a section plane perpendicular to the mold face that molds the running surface, is larger than the minimum distance between the cavity and the mold face that molds the running surface.

Description

Mould and the tyre surface of making therein

Technical field

[0001] the present invention relates to the mould and the tyre surface of tire, relate in particular to a kind of mould, this mould can moldedly have the tyre surface in chamber, and wherein at least a portion in this chamber is positioned under the running surface and leads at least one side of described tyre surface.

Definition

[0002] term " axial " and " axially " expression is basically parallel to the direction of turning cylinder of tire in this article.When these term application during in tyre surface, in case tyre surface is fixed on the tire, their expressions are parallel to the direction of the turning cylinder of tire.That is to say, axially be the direction of while perpendicular to tread thickness and tire circumference.

[0003] term " radially " and " radially " expression and a direction that vector parallels of direction perpendicular to axial direction, the turning cylinder of itself and tire is crossing.When these term application during in tyre surface, their expressions and a direction that vector parallels perpendicular to the turning cylinder of tire, in case tyre surface is attached in the tire, this direction comprises a bit on the tyre revolution moving axis.That is to say, radially be the direction that is parallel to tread thickness.

[0004] " running surface " of tyre surface should be understood like this, and its such surface of expression, this surface point that tyre surface contacts with ground during by tyre rotation forms.

[0005] " side " of tyre surface expression extends to any part of the tread surface of sidewall from the axial end of running surface.During tyre surface before considering to be incorporated into tire, the side is made up of part such in the tread surface, and this part is connected to an axial edge of running surface and is designed to the surface that contacts with the carcass of tire.

[0006] " pin " should be understood like this, its expression is designed to any molded element of molding cavity, the at least a portion in wherein said chamber is positioned at the below of the die face of molded described running surface, and leads at least one side of tyre surface, and the geometry in this chamber is unrestricted.

[0007] " longitudinal axis " of pin expression is basically parallel to the axle of the maximum sized direction of pin.

[0008] " mixture " or " rubber composition " expression comprises the rubber composition of at least a elastomer and filler.

[0009] " stream " of mixture expression molded during the meter flow of mixture.

[0010] " it is asymmetric to flow " that produce during chamber molded should be understood like this, velocity field in its expression mixture between the part of pin asymmetric, described pin molded this chamber on perpendicular to the either side on the surface of the die surface of molded running surface, described pin comprises on the pin from farthest a bit of die face, described die face is used for molded running surface, and this will be explained hereinafter.

[0011] here, the elastic housing of term " tire " expression any kind, no matter whether it inflates, and no matter whether it is subjected to interior pressure in use.

Background technology

[0012] existence in chamber that is positioned at the tire running lower face and leads at least one side of tyre surface has given tire favourable characteristic, especially when the maximum ga(u)ge of its tyre surface surpasses 15mm.This chamber helps to cool off the tire shoulder (passing through draught effect) of tire and has improved its durability thus.Because they appear at tread surface when the wearing and tearing of tyre surface take place, so they have also proposed the pattern of tyre surface development, firmly grasp on wetland, snowfield and ice face helping.

[0013] allow the mould of the molded tyre surface that has a this chamber known already.Can be divided into two kinds of methods: movable pin is thrust in the uncured rubber composition, the mixture of tyre surface to be formed is flowed and surround this pin.

[0014] U.S. Pat 1604450 is examples of first method: it has described a kind of use of movable pin, after uncured tire is placed in the mould and the side of should the activity pin before the tyre vulcanization axially thrusting tyre surface.This pin thorn is fashionable necessary indeformable, also do not move simultaneously, and do not make uncured squeegee action, so this is restricted the geometry of pin and thickness (mechanical strength).

[0015] mould of corresponding second method can be at molded stage not mobile pin during molding cavity.U.S. Pat 6408910 has been described a kind of mould, and the pin of this mould for good and all is fixed to the housing that is used for the moulding of tyres sidewall.When molded, the interior pressure in the uncured tire that applies by film-so plastically deformable-the increased external diameter of uncured tire.The institute that this stage that is called as " shaping " forces the material that constitutes tyre surface to be filled up in the mould has living space, thereby produces the final tyre surface that constitutes the chamber.In order to take out tire from mould, housing is axially separated, to allow taking out pin from tyre surface.This method has a defective: because it must meet the thickness of desired form at least, so it only can be used in shaping stage and more significantly makes, and it comprises the chamber under the running surface.

[0016] present, the trend on the industry is the degree of attempting to limit as much as possible shaping.Here it is, and patent application EP1232852 discloses the reason of the mould of another kind of type, and it is corresponding to first method.This mould that proposes comprises fan-shaped part of a series of crowns and the fan-shaped part of a series of tire shoulder that is designed to molded radial cavity or groove, and described tire shoulder scallop branch comprises the pin that is designed to molded axial cavity, and this two serial district can move radially.The layout of pin makes pin arrange that diameter of a circle thereon increases on behaviour area before the placement in place of uncured shell, thereby can reduce the crystallized ability of shell.Proposed should divide with the crown scallop to contact, be applied to pressure on the pin thereby resist material to be molded at the stage pin that radially thrusts mixture.Therefore can use long and thinner pin, it is flexible under the pressure of uncured mixture.

[0017] these two kinds of methods in use all are proved to be effective; Yet the tyre surface of Zhi Zaoing can have not desired characteristics like this.In fact, no matter select which kind of method: pin radially thrust or the mixture of the inevitable either side with pin of the formation of the Radial Flow of mixture, final tyre surface flows, and be formed on the composition surface that extends between the die face of tyre surface of the surface of pin and moulding of tyres.Especially since during molded sensitive to pollution, so the use of the mould of this area the present situation has produced perpendicular to the composition surface that proves friable surface.

Summary of the invention

[0018] target of the present invention is the position of control bonding land and with respect to the direction of surface of tyre.Proposed to realize it by the mould that is used for molded tyre surface by the rubber composition manufacturing, this tyre surface has the running surface that is limited by side axial, described mould comprises at least one part that is used for molded running surface, at least two side direction parts that are used for molded side, with at least one pin that is used for molding cavity in tyre surface, when in the cross section also perpendicular to axial direction, observing perpendicular to the surface of molded running surface, described pin has a surface, this surface has the profile that is formed by first outline portion and second outline portion, these outline portions are in the profile point on the surface of approaching molded running surface and extend between the profile point away from the surface of molded running surface, described pin is positioned at the lower face of molded running surface at least in part and is connected at least one surface that is molded to small part tyre surface side, thereby described pin produces two rubber mix logistics during molded, these two stream surrounds these pins and converges and form composition surface, described mould is characterised in that at least one pin has to make and mixes the asymmetric device of logistics, thereby the composition surface in described viewed in plan has following feature: measure between the surface of pin and the surface of molded running surface, the trace of the composition surface on the described plane (trace) length is greater than the surface of pin and the minimum range between the described surface of molded running surface.

[0019] several from the identical maximum distance apart of the die face of molded running surface time the when this profile use at two points farthest perpendicular to direction radially also perpendicular to axial direction.These two outline portions in these two points each and extend between the profile point on the surface of approaching molded running surface.If several profile point have the identical minimum range with respect to the surface of molded working face, use similar method.As example, for a pin, if its surface in the cross section also perpendicular to axial direction perpendicular to the die face of molded running surface is a rectangle, the length of this rectangle is parallel to the die face of molded running surface, the width of this rectangle is perpendicular to this die surface, and these two outline portions overlap with the width of described rectangle so.

[0020] degree that no matter is shaped, mould of the present invention can enlarge the composition surface that extends between the die face of the surface in chamber and molded running surface; This device that proposes can be used in and has the mould that is shaped or does not have shaping.

[0021] several means can be used for obtaining asymmetric stream.Especially the geometry of pin can be selected to during the thrusting of pin or can produce asymmetric mixing logistics at mixture around between the pin flow periods under the situation about being shaped.

[0022] in a preferred embodiment, by the pin that uses first and second outline portions to have different length make described flow asymmetric.Preferably, the difference between the length of first and second outline portions equals 10% of shorter outline portion length at least.

[0023] in another preferred embodiment, by provide average rugosity to make around the mixing logistics of pin asymmetric for an outline portion greater than the average rugosity of another outline portion.For example, the rugosity of first can the rugosity of second portion can reduce by polishing by sandblasting increase.Preferably, differ 2 microns at least between the average rugosity Ra of first and second outline portions.Certainly, can by use first and second parts to small part have different length and rugosity pin and in conjunction with the effect of geometry and surface roughness.

[0024] in the 3rd preferred embodiment, by at least one the applied chemistry coating to described outline portion be created on the described part rubber composition slip velocity difference make flow asymmetric.For example, first outline portion can scribble Araldite  and second outline portion is made by steel.By use first and second outline portions all to have coating and have different length and/or rugosity pin and advantageously in conjunction with the effect of coating and the effect of geometry and/or rugosity.

[0025] in the 4th embodiment,, makes by producing mean temperature difference between corresponding to the surface of first and second outline portions of each pin that to mix logistics asymmetric by temperature effect.Preferably, the temperature difference is at least 20 ℃.Undoubtedly can make around the mixing logistics of each pin asymmetric in conjunction with the temperature of pin and the effect of geometry and/or rugosity and/or coating with the mode of the best.

[0026] in the 5th embodiment, at least one pin that is used for molding cavity has and is used to make it to center on the attachment device of its longitudinal axis rotation substantially.During pin thrusts mixture (if pin is movable),, before the sulfuration of tyre surface, can carry out this rotation at shaping stage (if having) and/or when the mixed thing of pin centers on.

[0027] all above-mentioned embodiment can be applicable to have or do not have in the mould of shaping.Last preferred embodiment relates more particularly to not have the mould of shaping, and after tire blank or tyre surface be inserted in the mould, the movable pin of this mould thrust in the mixture that forms tyre surface.In this preferred embodiment, being preferably columniform at least one pin installs like this, making can be with respect to mould shaft to radially movable, thereby it can carry out translational motion in a plane, described plane with radially form one less than 90 ° angle.This mixture that flows around this pin during pin thrusts mixture is converging through after the pin again, and forms composition surface, and this composition surface tilts with respect to the plane of the die face of vertical molded running surface.Therefore, measure between the surface of pin and the die face of molded running surface, the average length of the trace of composition surface on the described plane, greater than the minimum range between the die face of the surface of pin and molded running surface.Can be in conjunction with being the effect of thrusting less than the direction at 90 ° of angles along direction with respect to the vertical mold face, with temperature and/or geometry and/or rugosity and/or coating and/or pin basically around the effect of its longitudinal axis rotation, thereby enlarge the composition surface that between the die face of the surface of pin and molded running surface, extends.

[0028] the present invention also relates to a kind of tyre surface of making by rubber composition, this tyre surface has the running surface that is limited by the side and comprises at least one chamber, be positioned at the running surface below to the described chamber of small part and lead at least one side of described tyre surface, this tyre surface has the composition surface that extends between the surface at least one chamber and running surface, described tyre surface is characterised in that: measure between chamber and running surface, the length of the trace of the composition surface in the cross section also perpendicular to axial direction perpendicular to running surface is greater than the surface in chamber and the minimum range between the described running surface.Preferably, the surface in the length of described trace and chamber and make between the surface difference between the minimum range greater than 20% of described minimum range.

Description of drawings

[0029] description with reference to the accompanying drawings will be understood the present invention better, wherein:

[0030] Fig. 1 has shown the schematic axial section of the part mould that is in closed construction and the appropriate section of molded tire in this mould.

[0031] Fig. 2 has shown the schematic radial section AA ' of mould among Fig. 1, it the is adaptive pin of prior art.

[0032] Fig. 3 has shown the schematic radial section AA ' of mould among Fig. 1, and it is adaptive according to the present invention and the pin of diagram " outline portion " notion.

[0033] Fig. 4-the 7th, the schematic diagram of the radial section AA ' of mould among Fig. 1, it represents that pin of the present invention thrusts in the mixture that constitutes tyre surface.

[0034] Fig. 8-the 11st is according to the generalized section of the modification of pin of the present invention.

The specific embodiment

[0035] Fig. 1 has shown the mould of the present invention 1 that is in closed construction.This figure is schematic: especially, only depicted the part with molded relevant mould 1; Omitted the enhancing part in order to know.In order to understand the function of said elements better, the appropriate section of the tire 10 that mould 1 obtains also is illustrated.Along seeing the fan-shaped part 2 of crown in this phantom on plane of the turning cylinder that comprises tire, the fan-shaped part of this crown has projection 3, with the chamber or the groove 11 of the tyre surface 12 that is used for moulding of tyres 10.The fan-shaped part 2 of this crown can move radially with respect to housing 4, and described housing is the sidewall 13 of moulding of tyres 10 in known manner.The fan-shaped part 2 of crown has the pin 5 that is designed to form chamber 18, and described chamber extends axially and lead to a side 17 of tyre surface 12 in the lower face of travelling.This pin 5 can move axially, thereby allows tire to take out from mould.

[0036] Fig. 2 has schematically shown the radial section AA ' of mould 1 among Fig. 1, and it has the pin 50 of prior art.The mixture 14 that this pin 50 is configured tyre surface 12 centers on.The part of the fan-shaped part 2 of crown also can be in sight.Running surface 15 is on the interface between tyre surface 12 and the fan-shaped part 2 of crown.

[0037] pin 50 of prior art does not produce asymmetric mixing logistics during chamber 18 molded: the velocity field of characterization mixing logistics is with respect to an axis symmetry, and this axis normal is in the die face 16 of molded running surface 15 and pass point 60 away from the pin of this face.Therefore, walk around the die face 16 that the composition surface 30 that forms between the mixture part that pin 50 flows is substantially perpendicular to molded running surface 15 during molded.The minimum range 20 of separating between the surface that its length is substantially equal to pin 50 and the face 16.

[0038] Fig. 3 has shown the schematic cross-section AA ' of mould 1 among Fig. 1, and it is adaptive according to pin 51 of the present invention.This pin 51 illustrates the notion of " outline portion ".In selected cross section, can easily see the point 61 and the point 71 of the profile of pin 51, and two

outline portions

151 and 251 that connect these points, its mid point 61 from the die face 16 of molded running surface 15 farthest, point 71 is nearest from this face.In this case, the length difference between first and second outline portions equals 20% of part 251 length.

[0039] Fig. 4-the 7th, the schematic diagram of the radial section AA ' of mould 1 among Fig. 1, it represents that pin 50 of the present invention thrusts in the mixture 14 that constitutes tyre surface 12.This order is effective for mould that has shaping when surrounding pin 52 (when mixture 14 motion and) or the mould (pin 52 motions and thrust in the mixture 14) in this case, that do not have a shaping.

[0040] Fig. 4 has shown the radial section AA ' of the mould 1 when pin 52 beginnings contact with the mixture 14 that constitutes tyre surface 12.This contact occurs in point 62 places of pin 52, and this is from the die face 16 of molded running surface 15 (Fig. 7) farthest.

[0041] the identical radial section AA ' of mould 1 after Fig. 5 has shown for a moment.The point 62 of pin 52 has thrust in the mixture 14,

mixes logistics

41 and 42 thereby produce two.The geometry of pin 52 produces asymmetric stream as can be seen: mixture part 41 is than the mixture part 42 that flows around pin 52 at opposite side approaching face 16 quickly.Should be noted that to make and flow asymmetricly that this pin tilts with respect to the direction of vertical mold face 16 by pin with symmetry axis 80 (dotted line among Fig. 4).For selected oblique angle, the difference between

outline portion

152 and 252 the length is 10% of part 152 length.If identical pin 52 is installed to mould and make axle 80 perpendicular to face 16,

part

152 and 252 equal in length and this pin can not make the

mixing logistics

41 and 42 of walking around it produce asymmetric so.

[0042] Fig. 6 has shown and has mixed the identical section AA ' that the mould 1 when converging again after the pin 52 is walked around in logistics 41 and 42.The point again 43 that constitutes the initial point of composition surface 32 (Fig. 7) does not overlap (Fig. 4) with the point 72 near die face 16.

[0043] Fig. 7 has shown the identical section AA ' of the mould 1 when pin 52 is finished in the mixture 14 that thrusts formation tyre surface 12.Mixture 14 surrounded pin 52 and fill up pin 52 and the face 16 of molded running surface 15 between the space.The

part

41 and 42 of walking around the mixture that pin 52 flows is converged and is formed composition surface 32, and this composition surface extends to the face 16 of molded running surface 15 from the surface of pin 52.The asymmetric fact that flows has produced the oblique angle (α) of composition surface 32.In trace length that measure between the surface of pin 52 and the die face 16, should surface 32 on the section, leave the minimum range 22 of face 16 greater than the surface of pin 52.

[0044] Fig. 8 has shown the schematic radial section AA ' of mould 1 among Fig. 1, and it is adaptive according to another pin 53 of the present invention.Pin 53 by geometry in particular makes and flows asymmetricly, and this pin does not have symmetry axis on selected section.The die face 16 that connects the molded running surface 15 of distance farthest point 63 and the length difference between the

outline portion

153 and 253 of nearest point 73 equal 10% of part 253 length.The asymmetric fact that flows has produced the oblique angle (β) of composition surface 33, and this composition surface is formed to be flow through between the mixture part of pin 53 during molded.In trace length that measure between the surface of pin 53 and the die face 16 of molded running surface 15, should surface 33 on the section, the minimum range 23 of separating greater than the surface 16 of the surface of pin 53 and molded running surface 15.

[0045] Fig. 9 has schematically shown the radial section AA ' of mould 1 among Fig. 1, and it is adaptive according to the 4th pin 54 of the present invention.As the situation of front, the geometry by pin 54 makes that to mix logistics asymmetric.This pin has the shape near pin 52, and difference is that one of them outline portion has the axial ridges 91 and the groove 92 of layout parallel to each other, 3mm and have the high triangular cross-section of 2mm at interval between them.The die face 16 that connects the molded running surface 15 of distance farthest point 64 and the length difference between the outline portion 154 and 254 of nearest point 74 equal 10% of part 154 length.The asymmetric fact that flows has produced the oblique angle (γ) of composition surface 34, and this composition surface is formed to be flow through between the mixture part of pin 54 during molded.In trace length that measure between the surface of pin 54 and the die face 16 of molded running surface 15, should surface 34 on the section, the minimum range 24 of separating greater than the surface 16 of the surface of pin 54 and molded running surface 15.

[0046] Figure 10 has schematically shown the radial section AA ' of mould 1 among Fig. 1, and it is adaptive according to the 5th pin 55 of the present invention.Compare with above-mentioned example, it is asymmetric that the mixing logistics here is not that the geometry owing to pin 55 causes, but by rotation pin 55 during molded.This rotation causes velocity field to become asymmetric: by rotatablely moving of pin 55, the mixture of the pin of flowing through is not that to be accelerated be exactly to be decelerated in its motion.Therefore, the composition surface 35 that forms between the mixture part of pin 55 of flowing through during molded tilts.In trace length that measure between the surface of pin 55 and the die face 16 of molded running surface 15, should surface 35 on the section, the minimum range 25 of separating greater than the surface 16 of the surface of pin 55 and molded running surface 15.

[0047] Figure 11 has schematically shown the radial section AA ' of mould 1 among Fig. 1, and it is adaptive according to pin 56 of the present invention, and described pin is installed like this, makes it axially and radially moving with respect to mould 1 with the direction that radially becomes (6) angle.The direction of pin translational motion is represented by arrow.In case pin has passed through and formed composition surface 36, wherein said composition surface tilts with respect to the plane of the die face 16 of vertical molded running surface 15, and the mixing logistics through the cylindrical pin both sides during pin thrusts mixture converges again.The minimum range 26 that the length of the trace of this composition surface 36 is always separated greater than the surface of pin 56 and face 16 in the section.

[0048] may be except the end of pin, on whole pin almost, when asymmetric, can obtain satisfied result when mixing logistics.

[0049] although Fig. 1 has shown the pin 5 of molding cavity 18, wherein said chamber extends to a half width of tire from the side of the tyre surface 12 of tire 10, is to be understood that described chamber 18 can extend beyond the middle part of tyre surface.Also it is contemplated that shorter chamber.

[0050] same, be to be understood that no matter want on only side of tyre surface molding cavity or on two sides molding cavity, can use principle of the present invention.Chamber on opposite side can be arranged symmetrically or asymmetricly.The fan-shaped part 2 of crown can cover the whole width of tyre surface or only cover its part.

[0051] depends on result that the finished product tyre surface is required and determine the quantity of pin 5 and its geometry accurately.Each fan-shaped part can have several pins, and is perhaps opposite, and some fan-shaped parts can not have pin at all.

[0052] described in document EP 1232852, pin 5 also can be installed to the fan-shaped part of the tire shoulder that can move radially.

[0053] pin can be axial arranged or be arranged along the direction that tilts with the tire axle.And the radial cross-section of at least one pin can change along the full-size direction of pin.

[0054] can molded tyre surface according to mould of the present invention, this tyre surface can the yes or no annular, can have finite length, and is perhaps opposite, has accurate indefinite length, can be continuously and smooth.The tyre surface that like this not only can molded planned production or the tyre soles process of tire can also the molded rubber crawler belts.

Claims

1. the mould (1) that is used for the molded tyre surface of making by rubber composition (12), this tyre surface (12) has the running surface (15) that is axially limited by side (17), described mould (1) comprises at least one part (16) that is used for molded running surface (15), be used at least two side direction parts (19) of molded side (17) and be used at least one pin (5 of molding cavity (18) in tyre surface (12); 51; 52; 53; 54; 55; 56), when observing in the cross section also perpendicular to axial direction perpendicular to the die face (16) of molded running surface (15), described pin has a surface, and this surperficial profile is by first outline portion (151; 152; 153; 154) and second outline portion (251; 252; 253; 254) form, these outline portions are in the profile point (71 of the die face (16) of the most approaching molded running surface (15); 72; 73; 74) and away from the profile point (61 of the die face (16) of molded running surface (15); 62; 63; 64) extend described pin (5 between; 51; 52; 53; 54; 55; 56) be positioned at described (16) below of molded running surface (15) and be connected to molded tyre surface (12) at least one die face at least in part to small part side (17), thus during molded described pin (5; 51; 52; 53; 54; 55; 56) produce two rubber mix logistics, this pin (5 is surrounded in these two rubber mix logistics; 51; 52; 53; 54; 55; 56) and converge again and form composition surface (32; 33; 34; 35; 36), described mould is characterised in that at least one pin (5; 51; 52; 53; 54; 55; 56) have to make and mix the asymmetric device of logistics, thereby at this composition surface (32 of described viewed in plan; 33; 34; 35; 36) has following feature: at pin (5; 51; 52; 53; 54; 55; Composition surface (32 that measure between the die face (16) of surface 56) and molded running surface (15), on the described plane; 33; 34; 35; 36) trace length is greater than pin (5; 51; 52; 53; 54; 55; Minimum range (22 between described (16) of surface 56) and molded running surface (15); 23; 24; 25; 26).

2. according to the mould of claim 1, it is characterized in that: described first outline portion (151; 152; 153; 154) length and described second outline portion (251; 252; 253; 254) length difference.

3. according to the mould of claim 2, it is characterized in that: described first outline portion (151; 152; 153; 154) the length and second outline portion (251; 252; 253; 254) difference between the length equal at least shorter outline portion length 10%.

4. according to the arbitrary described mould of claim 1-3, it is characterized in that: one of them outline portion has the average surface rugosity greater than another outline portion.

5. according to the mould of claim 4, it is characterized in that: described first outline portion (151; 152; 153; 154) and second outline portion (251; 252; 253; 254) the average surface rugosity Ra between differs 2 microns at least.

6. according to the arbitrary described mould of claim 1-5, it is characterized in that: at least one outline portion is covered with coating at least in part, thereby produces the slip velocity difference of mixture on described outline portion.

7. according to the arbitrary described mould of claim 1-6, it is characterized in that: also provide at least one pin (5; 51; 52; 53; 54; 55; 56) first outline portion (151; 152; 153; 154) the surface and second outline portion (251; 252; 253; 254) produce the device of mean temperature difference between the surface.

8. according to the mould of claim 7, it is characterized in that: described temperature gap equals 20 ℃ at least.

9. according to the mould of claim 1, it is characterized in that: at least one pin (5 that is used for molding cavity (18); 51; 52; 53; 54; 55; 56) have and be used to cause pin to center on the attachment device of its longitudinal axis rotation substantially.

10. according to the arbitrary described mould of claim 1-9, it is characterized in that: at least one pin (5; 51; 52; 53; 54; 55; 56) install like this, make its can with respect to mould shaft to radially move, thereby it can carry out translational motion in a plane, described plane with form one perpendicular to radially direction less than 90 ° angle (δ).

11. tyre surface (12) by the rubber composition manufacturing, this tyre surface (12) has the running surface (15) that is defined by side (17) and comprises at least one chamber (18), be positioned at running surface (15) below to the described chamber of small part and lead at least one side (17) of described tyre surface (12), this tyre surface (12) has the composition surface (32 that extends between the surface of at least one chamber (18) and running surface (15); 33; 34; 35; 36), described tyre surface (12) is characterised in that: measure between the surface of chamber (18) and the running surface (15), perpendicular to the composition surface (32 in running surface (15) and the cross section perpendicular to axial direction; 33; 34; 35; 36) trace length is greater than the surface of chamber (18) and the minimum range (22 between the described running surface (15); 23; 24; 25; 26).

12. the tyre surface (12) according to claim 11 is characterized in that: minimum range (22 between the surface of the length of described trace and chamber (18) and the running surface (15); 23; 24; 25; 26) difference between is greater than described minimum range (22; 23; 24; 25; 26) 20%.